957 resultados para Reforço
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Com o objetivo de ganhar competitividade no mercado internacional e contribuir para o desenvolvimento tecnológico no país, o presente trabalho apresenta a técnica de processamento de moldagem por transferência de resina (RTM), utilizada na fabricação de materiais compósitos estruturais e ainda pouco estudada no Brasil. Os compósitos processados por essa técnica apresentam maior fração volumétrica de fibras, melhor acabamento superficial e pouca ou nenhuma necessidade de acabamento do componente produzido. Este trabalho compreende a caracterização de compósitos produzidos com resina epóxi monocomponente RTM6 e o tecido não dobrável de fibra de carbono. Os compósitos produzidos pela Hexcel Composites foram analisados pela técnica de ultrassom C-Scan e os resultados mostraram que os laminados processados estão homogêneos quanto à impregnação. Ensaios mecânicos mostram que os laminados com tecido apresentam características comparáveis à dos compósitos produzidos em autoclave com maiores porcentagens de reforço. Em fadiga, os laminados apresentaram um alto e curto intervalo, com tensões próximas à de tração. Quanto ao comportamento térmico observou-se melhora nas propriedades com a adição do reforço de fibras de carbono, que promoveram o aumento da temperatura de transição vítrea (Tg). Quanto ao comportamento viscoelástico, foi observado a influencia da temperatura e freqüência no material. Considerando as propriedades mecânicas e térmicas, ambos os compósitos foram classificados como adequados à aplicação proposta.
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Neste artigo, procura-se afastar da discussão a respeito das vogais nasais do português idéias e argumentos que só a tem perturbado. Em seguida, resumem-se as três interpretrações que os fonólogos lhes têm dado, detendo-se na de Mattoso Câmara Jr., a que se acrescentam alguns exemplos de reforço.
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Pós-graduação em Odontologia Restauradora - ICT
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Pós-graduação em Educação Escolar - FCLAR
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Pós-graduação em Engenharia Mecânica - FEG
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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The change in design of a building can occur during its construction process, especially when this change involves greater amount of profit for the building company, as it is the case of adding extra floors. However, there must be an analysis of the structure of the building in order to see if it is possible to increase the number of floors without the need of reinforcement, as this need would result in higher costs for the building company. This graduation report presents this analysis by using the methods of third order verification of reinforced concrete structures
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The concern with the environment preservation has done with that researchers as well as industries invest in the search for materials that come from renewable sources. Natural fibers, because they are ecologically correct and have low cost, have been studied as a possible substitute, even if partial, of synthetic fibers in the development of polymeric composites. In this context, the hybrid composites (natural/synthetic) increase considerably the range of application of natural composites. The auto industry, in its constant quest for good mechanical properties materials which are developed with sustainability, has in composites with hybrid reinforcement a very viable alternative. In the present work, the nature Crown pineapple fibers and nature Crown pineapple fibers treated with alkaline solution were studied in order to evaluate the influence of chemical treatment in its properties. For this techniques were used x-ray diffractometry, Thermogravimetry and Infrared Spectroscopy (FTIR). Composites have been developed using polypropylene, reinforced with pineapple fibers and pineapple fibers hybrids/glass fibres, both with levels of 5 and 10%. These composites were analyzed by Thermogravimetry techniques and tested by traction. The realization of this work indicated that although the chemical treatment did not affect the thermal stability of the fibers, caused an increase in crystallinity index fibers and decreased its hydrophilic. The tests performed on composite indicated that the composites process was suitable because it provided good dispersion of the polymer matrix. The addition of natural fibers from the pineapple's Crown, in a proportion of 10%, provided the greatest increase in modulus of elasticity (27%) when compared to the pure polymer
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This paper aims to review the concept of Festival in the area of Public Relations and discuss about it according to the Classical Anthropology, Urban Anthropology and Public Relations theories, by their main exponents Emile Durkhein, Rita Amaral, Roberto Damatta and Joseph Guilherme Magnani, Waldemar Kunsch, Margarida Kunsch, Cicilia Peruzzo, Rennan Mafra and Márcio Simeone. The 33rd Vila Madalena Fair, a craft fair that takes place once a year in São Paulo, was chosen as a case study to provide this research with an empirical dimension. The Fair emerged as a result of the neighborhood residents and merchants´ mobilization in the late 70's and until today, has been responsible for the re-updating and the strengthening of the neighborhood identity. Thus, the proposal is to evaluate the possibilities of the Festival performance as a favorable strategy to sociability, to the strengthening and the re-updating the symbolic representations of a community
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In the modern world it is common to witness the family or the school complaining about the behavior of children. Parents have lost control of how to educate their children, who have difficulty in following rules, boundaries and discipline. In the short time they stay with their children, their parents feel desperate in how to educate and seek the help of experts who apply techniques inspired by behavioral therapy. A recent phenomenon is the search of the family by the media, so that helps to set limits for their children. The main objective of this study is to identify intervention techniques used in television show called Supernanny, verifying the concept of education and its effects on family. The methodology is exploratory research, using technical analysis as a specific program for television, videorecorded. Data analysis was performed by a video recording of the three programs shown, which were compared using frames. Contact that currently, the parent-child relationship is permeated by a lack of boundaries, which causes families to seek guidance from experts and the media - which is one of the most powerful means of dissemination and communication. The program presents Supernanny behavioral techniques that seem to work with a simple sleight of hand, but in real life translates into a long-time adjustments, challenges and frustrations. Moreover, many of them induce the conditioning, to achieve something by means of strengthening and heteronomy, which leads the viewer to take a more critical eye on those programs